Mold-ramming machine



Filed Dec. s, 192:5

J. STONEV MOLD RAMMING MACHINE 2 Sheets-Sheet 1 www5 Jan, Z.

J. STONE MOLD RAMMING MACHINE 2 Sheets-Sheet 2 Filed Dec. 5, 1925 raam-ee im. ze, reas.

entre stares Jessen sirene, `or erlesenen., Lanai/ra.

reses-erreurs Messwe- Application filed December 3, Serial No. 578,216.

To ZZ ywapo/mi 2f may concer/a.'

Be it known that l, Jos-urn S'roNn, a citizen of the United States, residing at Bessemer, in the county of Jefferson and State of Alabama, have invented certain new and useful Improvements in lifold-Ramming Machines. of which the following is a specification, reference being had therein to the accompanying drawings.

vThis invention `relates to a mold ramming machine and it has for its object to provide a mechanism adapted to deliver a predetermined quantity of molding sand into a flask which has been superimposed upon a pattern frame to, then advance that flask to ramming position where the sand is acted upon by a plurality ofr angularly disposed peans or side rammers and thereafter is acted upon by a plurality of vertically acting butt rammers in such manner that the sand is tamped into the mold and about the patterns with great firmness and at such speed that great economy in operation Iis eected. The mechanism also comprises a luralitv of (rate reamers and means for eX- v C peditiously returning the pattern frame to the flaskreceiving position after the flask with the sand tamped therein has been removed 4from the pattern frame.

`1Further objects and advantages of the invention will be set forth in the detailed description which follows.

In the accompanying drawings:

Fig. 1 is a longitudinal sectional view of `a machine constructed in accorda-nce with the invention;

Fig. 2 is avpartial transverse sectional view of the machine;

Fig. 3 is a detail view of the clutch controlling mechanism hereinafter described; and

Figs. et and 5 are views of alternative forms of pean liftingmechanism,

Lilie numerals designate corresponding parts in allof the figures of the drawings.

. Referring to the drawings 5 designates the Vframe of the machinel which is lmounted upon track wheels though vit is manifest that it may bemounted upon other typesvof wheels without departure from the invention. Fixed side rails are carried by the opposite side frame members 5, only one of which is shown, but, which, it will be understood is duplicated upon the opposite side of the machine and these. rails constitute a track-way for a wheeled pattern frame 7.

This pattern frame carries patterns 8 and is adapted to receive upon its Lipper surface a fiask 9. A sandA hopper 10 is fed b v a ,conveyor l1 and the sand hopper and the ccnveyor are all'mounted upon extensions of the rails G so that Athe machine asa whole may be bodily moved Vtoward the pile ot sand as the sand is used. A "rotary` feeder 12 disposed ,in the sand hopper is so proportioned ethat Aupon Ia quarter turn of this feeder just the right amount of sand to properly ll the flask 9 is deliveied into said flask. Thereafter'a'lateral lug 15a on a conveyor flight 13 comesv into contact with a lug 15 on the flask and the flask is caused to travel fir-st along the rails' and then up a. pair of rails let which are pivoted at 15 and which have a straight horizontal section 16 at their ends. The flight 13 forces the pattern frame and flask up the inclined ways presentedby the rails 14 and ontothe straight horizontal portion where the flight ceases to act upon the pattern frame and leaves said pattern frame in a position of rest upon the lupper ends of the rails 141 with the wheels of the pattern frame resting in indentations 16"L ofthe rails, by which the pattern frame is held against accidental movement. The operator then grasps the lever 17, see Fig. 3 and shifts it upon its pivot 18 to throwa clutch section 19 into engagementv with a clutch section 20, the latter being carried by a pinion 21. This pinion is fast with the Vliub 22 of a pulley 23 which is driven by a'belt 24 from a motor 25. Since the clutchsectio-n `19`i`si splined upon a shaft 26 it follows that `this will result in imparting rotation tosaid shaft and in imparting movement to cranks 27 carried by Vsaid shaft. Thesecranks operate a s et of side rammers or peans which serve Ito initially ram sand into the wedged shaped recesses presented by the inclined overhanging top walls of the flask. lThe shape of the top walls of 'this flask is of importance because the side rammers or peans could not effectif/ely compress the sand into ,the fiaslt unless the sand was in a certain ,measure confined by the overhanging top walls and it will be seen that it fis the presence of these walls'ofthis shape which provides wedge shaped yrecesses into which the peans may, by their ramming action, compress the sand. However, it is not to beunderstood that the invention is limited to flasks having over-hanging top walls of the particular angle or shape shown,

icc

because it is frequently the case that patterns of different shapes require flasks of different shapes and thus I contemplate making these peans of such construction that the angle upon which they act maybe varied at will. Thus I have illustrated connecting rod 28 pivotally connected to the cranks at 29, the lower ends of said connecting rods having heads 30 at their lower ends which engage transverse pins 31 upon the upper ends of tu` bular sections 32 of the peans. These tubular sections slide through bearings 33 which bearings are rendered adjustable in arcs by being provided with ears in which arcuate slots are formed. through these arcuate slots and take into the side frame members 5 of the machine. The bearing 33 is common to all of the tubular sections 32 on that side of the machine, it being manifest that when the angle is to be changed for one pean it must be changed for all of the peans. v The pean heads 35 are mounted upon the lower ends of rods 36 which pass through bearing blocks 37 said blocks being pivoted` at 38 in the side frame members 5 topermit of the change of angle above described. tubular sections 32 and these members, that is the rods 34 and tubular sections 32 are yieldingly connected by springs 40 which lie between and have their ends connected to collars 41 of the rods 34 and collars 42 of the tubular sections 32. Thus upon move-I f' 35 from the flasks the springs serve as a pcsitive'connection to withdraw the heads 35. But they also act to provide a yielding connection during the ramming operation since it is manifest that as the sand is packed in under the inclined over-hanging walls 9a of the flask the stroke must be shortened, since otherwise the ramming effect would be too severe. Under these Aconditions the springs provide the necessary yielding con-Y nection between these parts. Therside ram# is driven from shaft 26 by sprocket gearing 43. Referring now to Fig. 3 it will be seen that the pinion 21 meshes with a gear wheel 44 which carries a cam lug 45 on its face. I prefer to make the ratio of thisgearing 3 to 1 but I may make it any desired ratio. The purpose of this construction is that when the side rammers or peans have made a predetermined number of strokes the cam lug 45 on gear wheel 44 will come in contact with the lever 17 and move it away from the gear 44 and disconnect clutch section 19V from the clutch section 20. K This will throw the opposite end of the lever? 17 n such Cli- Bolts 34 pass- `The rods 34 slide in thel rection as to bring a clutch section 46, which is splined upon a shaft 47 into engagement with a clutch section 48 which iscarried by a pinion 49, said pinion, in turn, being mounted upon the hub 50 of a pulley 51 over which the belt 44 passes. The result of this is to stop the shafts 26, 26b and to set the shaft 47 into operation. This shaft drives through cranks 52 to a cross-head 53 which reciprocates vertically in ways 54 and actuates the top or butt rammers 55. These vrammers are carried by rods 56 which having 7ieldinc enOaO'ement with the cross-head 57- D b b through the medium of springs 58. After these butt rammers have made a predetermined number of strokes they are brought to rest due to the fact that the pinion 49, see Fig. 3, meshes with a? gear wheel 60 which carries a cam lug 61 on its face and which Y Vv ever, it should not be understood that theV throwing of the clutch section 46 out of engagement with the clutch section 48 again throws the clutch section 19 into engagement with the clutch section 20 because'the parts are so proportioned and arranged that the movement of the lever .under the influence of the camV 61 is much less than thef influence of said lever under theiniiuence of the cam raised.

Then the operator draws the pattern frame and flask to the-dotted line position illustrated in Fig. 14 or uponv a pivoted track scction 62 which is provided with a stop V63 against which the pattern frame comes to rest. This pivoted track section 62 is normally heldagainst movement by a'latch v64 which is actuated b i a s )rinO' 65 to engage b 1D b a pin 66 on the frame 5. With the track section 62 locked against movement said track section serves to aid 1n supporting the portion 16 of the track 14 during the ramming open ation.. This is due to the fact that the track section 62 is provided with a projection 62et which underlies the free end of the track sections 14 during the ramniing operation. Wilien the pattern frame and flask havel reached the dotted lmepositlon illustrated in Fig'. l. a hand lever '67 is 0'ras ed and rr ZD pulled downwardly against the actionof Va spring 68 and this causes the descent of oneV or more gate reamiers 69 by which the gates are formed in the sand.l Then the flask' tif;

tern trainenndfthe.ipattern frame is. returned to position ;beneath the .sandy Ihopper 'lOlby kicking ott the-,triggerwa and 'tipping thetr'ack 4section G Zfupivardly toibring their inner enty 'Sinto `alignment 'with the right handendsot rails'f/G, (fEig. zlz). Ylllienthis is f done the pattern "traine rolls. down fthe. Vinclined way presented .and E comesy to a lposition ot restragainststop 6? and in.position to receive Vanother tlaskavhich iiask is to be filled with .sandtrom'ghopper 10 ypreparatoryto `repeating ,the *above .described operation.

ltlis mani-fest that inany-ivays,mayibefdeviscd tor imparting movement: to the, parts and particularly for actuatingthe.peans and it ,is to be understood vthat my .invention covers anUequivalent means tor actuating theseparts 'tromthe shafts 26,7261).

.One method .of .actuating these `peans is illustrated `inFig. .-l Wherewthe pean carrying rod is indicated at 5. rIhis rod isfslidably mounted inguides 76 and carries a tappet arm TT adapted to be engaged andllitted against the actionof spring 78 by one or more lugs T9 carried upon endless flight or be ts 80 which pass over pulley or sprocket wheels indicated diagrammatically at 81. lt is manifest that as the lugs 79 ride out ot engagement with the tappet 77 the spring will Jtorce the pean rods down with a sharp, quick stroke. Thus the rods will be lifted more or less slowly and against the action ot the spring but Will be returned with a sharp7 quick stroke.

Another construction tor accomplishing this result vis illustrated in Fig. 5 Where a wiper cam 82 acts against. a pin or lug 83 carried by the pean rod S-t and elevates it against the tension ot spring` 85 which bears between a :fixed guide 86 and a collar 87 carried by the pean rod. lVhen the nose 88 ot' the cam rides out ot engagement with the pin S53 the peau rod Will be thrown downwardly with a sharp. quick stroke by spring buty will be raised more or less gradually by the curved surface 89 ot' the cam.

lt is further to be understood that the invention is not limited to the precise construction set forth in any respect but that it includes Within its purview Whatever changes fairly come Within either the terms or the spirit of the appended claims.

Having described my invention what I claim is:

l. A molding machine comprising a plurality of side ran'nners or peans acting at an angle, plurality ot top rammers and means which when set in operation cause the operation oi the side peans for a predetermined number ot strokes then cause said side peans to stop and set the top rammers in operation tor a predetermined number of strokes and then bring said top rammers to rest.

2. ln a n'ioldinpl machine the combination witlrmeans torsupporting apattern trame andflask the Aflatter havingfincli-ned and.v overhanging .top Walls, of a. Vplurality .of side rammers ltortraimning .sand beneath the inclined-top walls and a vertically operated top rammer.'

Astructnre as recited in claim y2in combination .with fmeans for reciprocating all ofsai d .rammers` iet. .A structure asrecited in claim Qincombination with driving' means for the. rainmers .and means onor eoi'itrolling .said driving-.meansinsnch ymanne r as: to ypermit initial operation of the side rammers and a subsequent interruption. olf .said side rammers andoperation.ot the .top ran'uners.

5. ,/-hstructure as recited in claim -2 in combination Witlrfdriving means for. allot said. rain mers and clutch mechanism-tor controllinglthe drivingmeans comprising aside rammer clutch,.a top rammer clutch and interoonnecting` elements therebetween acting .to iirstshi'ft ltheclutches to setthe side rammers in operationandr` then interruptrthe side rannnersnnd .set the .top rammers`-in operation and then interrupt the operation of the top ramaners leaving all ot said rammers idle and in elevated position.

6. The combination with a supporting frame, transverse shafts at the opposite end thereof, cranks carried by said shafts, side rammers operated by said cranks, a central- 1y disposed shaft above the frame, top rannners operated from the centrally disposed shaft, tracks carried by the frame and a. pattern frame mounted to travel npon said tracks to a position Within the trame Where all of said rammers may cooperate therewith.

7. A structure as recited in claim 6 in combination With a trackWay for returning the pattern frame to its initial position.

8. In a machine of the character described the Combination with a sand hopper constituting a filling station, a trackivay leading therefrom, a pattern frame mounted to travel upon said trackway7 a liask adapted to be mounted upon the pattern frame and to be illed from said hopper, a track section for conducting the pattern frame to an elevated position, a return trackway for conducting the pattern trame from said elevated position to the filling station and means for propelling the pattern frame along the first named trackway to elevated position.

9. A structure as recited in claim S in combination with a tiltable track section upon Which the pattern frame moves from the said elevated position and by which the pattern frame is discharged onto the return trackWay.

10. A structure as recited in claim 8 in combination with a tilting track section upon which the pattern frame may be moved lill and by which the pattern frame may be dis charged to the return trackway and intereiigaging means between the tilting track section and the track section by which the pattern fra-nie is conducted to elevated position, whereby the latter is supported by the vformer during the ramming operation.

11. A structure as recited in claim 8 in combination with a plurality of gate reamers and means for imparting downward movement to them.

12. In a machine ot the character de-` scribed, a sand hopper constituting a fillingv station, feeding means for delivering sand in predetermined quantities from said hopper, a pattern frame, a flask adapted to be mounted upon the pattern frame and receive sandv Y from the hopper, a trackway upon which the patternfraine travels, a main frame by which the trackway isrcarried, an inclined pivoted trackway, means foi'propelling the pattern frame along the inclined pivoted trackway to a position within the main'` frame, av second pivoted trackway section,

a klatch for holding it against movement,

interengaging means between the two Vpivoted'track sections, angularly operating side peans, said ask comprising inclined top Walls beneath which said Vpeans may be proy jected, cranks to which said peans are operatively connected and by which they are Vreciprocated, transverse shafts by which said cranks are carried, means for operating said shafts in unison, a motor constituting the( driving means for said shaft-s, a vertically operating butt raininer and clutch connec-V tionsl between the buttrrammer and the trans-V verse shafts and means for operating said clutch connections in such manner that'alter Y the transverse shafts havemadea predetermined number of revolutions, said clutch connections are shifted to throw said shafts out of operation and to set the vertical butt i'amniers in operationand forinterruptingV 'c f Josi'irii sfroNn. Y 

